Strainer unit



M. E. DANILLS Sept. 26, 1933.

STRAINER UNIT Filed Sept. 10, 1932 CII `Patented4 sept. 26, 19133 MartinE. Danills,- Goodland, Kans.

Application September 10, 1932 Serial No. 632,606

This invention relates to straining devices and pertains particularly toa strainer of the character used in association with internal combustioneneach of these end plates is xed a bushing which is employed formaintaining the straining bagl or sack in proper position within thedevice. Each of these bushings holds a disk body .inA place against theadjacent plate and clamps against the plate the adjacent end of thestraining bag. Since the bushing which maintains the disk and plates inoperative relation is swaged over upon its inner end against the innerside of the adjacent plate, when the bag wears out or gets a hole in itso that it is no longer useful it is not possible to merely replace thebag but the entire unit must be discarded and a new one put in. Anyattempt to remove the bushings so that a new bag may be placed upon thespring body will merely result in the damaging oi the unit to such anextent that it can no longer be used.

The primary object of the present invention is to provide a bag unit inwhich the bushings may be readily removed from the end plates and thebag taken orf and a new one put in its place, thus making it possible torenew the straining unit when a bag becomes worn out merely by replacingthe bag instead of replacing, the entire unit.

With the present invention the bushings at the end of the strainer unitare detachably coupled with the end plates and removably hold in placeclamping disks which secure the ends of the bags in position.

The invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawing forming part of this specification, with the understanding,however, that the invention is not confined to any strict conformitywith the showing of the drawing but may be changed or modified so longas such changes or modifications mark no material departure from thesalient features of the invention as expressed in the appended claims.

In the drawingz- Figure 1 shows partly in'vertical section and partly inside elevation a straining unit of the type employed in the Purolatonshowing the improved construction embodyingl the present invention; t Av vFigure 2 is a View in side elevation ofa bushing, per se;

Figure 3 is a plan view of a nut vwl'fiiclrl'is made 'a permanent partof the unit;

Figure 4 is a plan View ofthe inner face of the central portion of anend plate from which the bushing has been removed. y

Referringnow more particularly to the drawing wherein like numerals ofreference indicate corresponding parts throughout the several views, thenumeral l indicates as a wholeV the unit embodying the presentinvention. This"strainer unit which as previously'explained forms a partof a 79 device which is designed for use in connection with Yinternalcombustion lengines `for straininggthe crank 'case oil,comprises'atubular cloth bag "i2 l in which is placed a relatively heavyhelical spring 3. y

Secured to each end of the helical spring is a circular plate 4 whichhas an aperture 5 centrally therethrough.

In this strainer unit constructed in accordance with the presentinventionthere is permanently secured to the inner face of each of theplates 4, coaxially with the opening 5, a threadedgnut 6.

While this is the preferred method of construction it is, of course, tobe understood that the invention also contemplates the forming of athreaded opening at this point, as for example, the central part of thedisk 4 may be thickened and have the opening 5 threaded. y

At the ends of the straining units are bushings 7 and 8 each of which isthreaded at one end as indicated at 9, the threads being cut relativelydeep so that there is formed at the inner Vend of the threaded portion ashoulder 10.

The threaded end of each bushing is extended through the adjacent endplate opening for engagement-with the threads of the nut; 6 and at theupper vend of the unit the bushing 7 has its threaded end portionextended through a iiat an-v nulus or disk 11 against which the shoulderportion 10 thereof bears. At the lower end of theA unit the bushing 8,which is of slightly greater diameter than the bushing 7, passes throughan opening 12 in the central part of a relatively large disk which isindicated by the numeral 13. This disk is of materially greater diameterthan the straining bag and spring over which it is placed and providedwith a series of openings 14 through which oil passes in its passagethrough the oil cleaner of which the unit 1 forms a part. This --o formof disk is of standard design and needs no 2 -is extended through theend opening of the bag and threadably engaged with the adjacent nut 6.As will be readily seenwhen the bushings are threaded in as far as theywill go each will rmly Y clamp the adjacent disk against the end of thebag and secure it to the adjacent end plate'.

At the upper end of the strainer unit the shoulder portion of thebushing 7 will clamp the small iiat annulus l1 against the adjacentplate 4 with the underlying part of the bag therebetween and at thelower end of the unit the bushing 8 will force the larger disk 13inwardly so that the inpressed annular rib 'portion` 16 will engageagainst the adjacent part of the bag and clam it to the bottom endplate.

From the foregoing it will bev readily apparent that by constructingthese straining units in the.

manner herein shown and described, when the cloth bag becomes damaged orworn to the point Vwhere it is no longer of use it may be readilyremoved and replaced by a new bag and the discarding of the entire unitwill not be necessary as is at present the case. Y Y

. Having thus described the inventionwhat is claimed is:-

- 1. In an oil straining unit having a kframe having two ends andprovided withran apertured plate at each end and a bag enclosing theframe and plates and having end openings. coinciding v,with said plateapertures, abushing threadably secured at one end in the aperture of aplate, and a flat annulus surrounding the bushing and held thereby inclamping relation with the adjacent plate and securing the edge of theadjacent bag opening to the plate. v

2. In an oil straining unit having a frame having two ends and providedwith an apertured plate at each end and a bag enclosing the frame andplates and having end openings coinciding with said plate apertures, abushingthreaded at one end and formed at the inner end of the threadedportion to provide a shoulder, said threaded bushing end beingthreadably engaged in the aperture of a plate, and a ilat annulussurrounding the threaded portion of the bushing and engaged at one sideby said shoulder and forced thereby against the edge of the adjacent bagopening to secure the same to said plate.

3. In an oil straining unit having a frame having two ends and providedwith an apertured plate at each end and a bag enclosing the frame andplates and'having endopeningscoinciding with said plate apertures, aninteriorly threaded nut secured against the under side of a plateCoaxial with the opening therein, a iiat annulus overlying the upperside of the plate and having the edge of the adjacent bag openinginterposed between the same and the plate, and a bushing having aportion at one end screw-threaded and formed at the inner end of thescrew-threadedV portion to provide a clamping shoulder, said threadedportion extending through said annulus,V

bag opening and plate and threadably engagingy said nut` land.operatingto hold the annulus in clamping relation with the plate to secure thebag thereto. l l MARTIN E. DANILLS.y

